Expansion joint



'- Feb. 12, 1929.

C. W. VALENTINE EXPANSION JOINT Filed May 1927 Patented Feb. 12,1929.

UNITED STATES PATENT OFFICE.

CHARLES W. VALENTINE, OF WATERTOWN, NEW'YORK, ASSIGNOR TO THE BAGLEY-AND SEWALL COMPANY, OF WATEBTOWN, NEW YORK, A CORPORATION OF NEWYOBIIL.

Application filed May 7,

This invention relates to certain improvements in expansion joints forsteam pipes and has been designed particularly for use with the dryingrolls of a paper making machine, though it is useful in other relations.

It is the especial object of the present invention to produce anexpansion joint for steam pipes in which a tight fit is provided,

but which at the same time will have the desired flexibility.without theneed of any slip joint through a packing box, the construct on beingsuch as to be simple and, therefore, 1nexpensive to produce and easy toassemble.

With this and other objects not specifically referred to in view, theinvention consists in certain novel parts, arrangements and combinationswhich will be described in connec tion with the accompanying drawingsand the novel features pointed out in the claims hereunto annexed.

In these drawings,-

Figure 1 is a topview of a construct on embodying the invention, lookingin the direction of arrow 1 of Figure 2;

Figure 2 is a vertical section taken on the line 2--2 of Figure 1, and

Figure 3 is a cross section taken on the line 3-3 of Figure 2.

Referring now to these drawings, which show a preferred embodiment ofthe invention, there is provided a nipple section 1 threaded as at 2 toreceive the end of a steam pipe. Below this nipple section 1 is a sleeve3, the section 1 being locked to the sleeve 3 by meansof a lock-nut 4,this lock-nut being threaded to the sleeve and having a collar 5engaging a flange 6 formed on the end of the nipple section 1. Having atight slidingfit 1n the lower end of the sleeve is a second nipplesection 7, the outer end of which is threaded as at 8 to receive a pipe.Within the sleeve 3 is a flexible expansion member, shown in the form ofa bellows, made of light metal so that it can expand and contract, thisexpansion member being marked 9. The member 9 is anchored at one end, bya lock-nut 10. to the threaded depending flange 11 of a flanged member12 having a peripheral flange 13 which seats on the upper end of thesleeve and is locked in place by the lock-nut 4, before referred to agasket, as 14, being preferably interposed between the end of the nipplesection 1 and the flange 13. The other end of the flexible member '9 issecured to a lock-nut 15 EXPANSION JOINT.

1927. Serial No. 189,515.

having a depending flange 16 by which it 65 may be screwed to the upperend of the nipple sectlon 7 The lock-nut 15 has a peripheral flange 17which is arranged to engage with a contracted portion 18 in the sleeve,so as to limit the expanding movement of the bellows member 9.

In the best constructions, means are provided for preventing thetwisting or turning of the member 9 so as to prevent damage thereto.While these means may be somewhat varied, in the particular constructionillustrated this is simply and easily effected by shaping the sleeve 3so that its interior surface is hexagonal, and correspondingly formmgthe outer section of the nipple section 7. With the parts thus shapedthe tubing is prevented from turning or twisting while in use.

It will be observed that but one gasket is necessary, and that all theparts are held together b the lock-nut 4 without the necessity of theireing any bolts or screws for effecting the securing of the parts. Thus avery simple structure is provided, and one which is cheap to make, andeasy to assemble.

While the invention has been shown in its preferred form, it will beunderstood that certain changes and variations in the construction andarrangement of the parts may be made without departing from theinvention as defined in the appended claims.

What I claim is:

1. In a pipe joint, the combination of a sleeve, a nipple section at oneend of the sleeve, a second nipple section having a slidmg fit in theother end of the sleeve, a flexible member in the sleeve between thenipple sections, said member being anchored at one end and secured atits other to the sliding nipple section, means for locking one of thenipple sections and the sleeve to ether, and means for preventing theflexible member from turning.

2. In a pipe'joint, the combination of a sleeve interionly polygonal inshape, a nipple section at one end of the sleeve, 2. second nipplesection exteriorly polygonal in shape havmg a sliding fit in the otherend of the sleeve, a bellows shaped tube of flexible'r netal in thesleeve between the sections, said tube being anchored at one end andsecured at its other to the sliding nipple section, and means forlocking one of the nipple sections and the sleeve together.

-choring one end of the flexible member, a

second nipple section having a sliding fit in the opposite end of thesleeve, a lock-nut securing the-other end of the flexible member to thesliding nipple section, and a threaded clamping collar for locking oneof the nipple sections, the threaded memberand the sleeve together.

4 In a pipe joint, the combination of a sleeve having a threaded end, anipple section at one end of the sleeve, a flexible member in thesleeve, a threaded member below the nipple, means for anchoring one endof the flexible member to the threaded member, a second nipple sectionhaving a sliding fit in the opposite end of the sleeve, a flanged memberlocking the other end of the flexible member to the sliding nipplesection, a seat in the sleeve engaged by the flanged member for limitingthe movement of the flexible member, and means for locking one of thenipple sections, the threaded member and the sleeve together.

5. In a pipe joint, the combination of a sleeve having a threaded end,anipple section at one end of the sleeve having a flange, a flexiblemember in the sleeve, a threaded member having a flange seated on theend of the sleeve, means for locking one end of the flexible member tothe threaded member, a threaded collar. having aflange and acting toclamp the nipple section, the threaded member and the sleeve together, asecond nipple section having a sliding fit in the sleeve, and a lock-nutengaging the sliding nipple section for locking the other end of theflexible member thereto.

In testimony whereof, I have hereunto set my hand.

CHARLES W. VALENTINE?

